Cabletron Systems SmartSTACK 100 ELS100-24TXG User manual

SmartSTACK 100

ELS100-24TXG

ETHERNET SWITCH

INSTALLATION

AND

USER GUIDE

NOTICE

Cabletron Systems reserves the right to make changes in specifications and other informa-

tion contained in this document without prior notice. The reader should in all cases consult

Cabletron Systems to determine whether any such changes have been made.

The hardware, firmware, or software described in this manual is subject to change without

notice.

IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDI-

RECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT

NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR

THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN AD-

VISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAG-

ES.

by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005

Printed in the United States of America

Part Number: 9032947 January 1999

ELS100-24TX is a trademark of Cabletron Systems, Inc.

All other product names mentioned in this manual may be trademarks or registered trade-

marks of their respective companies.

FCC NOTICE

This device complies with Part 15 of the FCC rules. Operation is subject to the following two

conditions: (1) this device may not cause harmful interference, and (2) this device must ac-

cept any interference received, including interference that may cause undesired operation.

NOTE: This equipment has been tested and found to comply with the limits for a Class A dig-

ital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide rea-

sonable protection against harmful interference when the equipment is operated in a

commercial environment. This equipment uses, generates, and can radiate radio frequency

energy and if not installed in accordance with the operator’s manual, may cause harmful in-

terference to radio communications. Operation of this equipment in a residential area is likely

to cause interference in which case the user will be required to correct the interference at his

own expense.

WARNING: Changes or modifications made to this device which are not expressly approved

by the party responsible for compliance could void the user’s authority to operate the equip-

ment.

Printed on

Recycled Paper

Only qualified personnel should perform installation

procedures.

DOC NOTICE

This digital apparatus does not exceed the Class A limits for radio noise emissions from dig-

ital apparatus set out in the Radio Interference Regulations of the Canadian Department of

Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites

applicables aux appareils numériques de la class A prescrites dans le Règlement sur le

brouillage radioélectrique édicté par le ministère des Communications du Canada.

VCCI NOTICE

This is a Class A product based on the standard of the Voluntary Control Council for Interfer-

ence by Information Technology Equipment (VCCI). If this equipment is used in a domestic

environment, radio disturbance may arise. When such trouble occurs, the user may be re-

quired to take corrective actions.

CABLETRON SYSTEMS, INC.

PROGRAM LICENSE AGREEMENT

IMPORTANT: Before utilizing this product, carefully read this License Agreement.

This document is an agreement between you, the end user, and Cabletron Systems, Inc.

(“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software

program (the “Program”) contained in this package. The Program may be contained in firm-

ware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREE-

ING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES

THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY.

IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN

THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE. You have the right to use only the one (1) copy of the Program provided

in this package subject to the terms and conditions of this License Agreement.

You may not copy, reproduce or transmit any part of the Program except as per-

mitted by the Copyright Act of the United States or as authorized in writing by

Cabletron.

2. OTHER RESTRICTIONS

. You may not reverse engineer, decompile, or disassem-

ble the Program.

3. APPLICABLE LAW

. This License Agreement shall be interpreted and governed

under the laws and in the state and federal courts of New Hampshire. You accept

the personal jurisdiction and venue of the New Hampshire courts.

EXCLUSION OF WARRANTY

AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in

writing, Cabletron makes no warranty, expressed or implied, concerning the Pro-

gram (including its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUP-

PLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IM-

PLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RE-

SPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,

AND ANY ACCOMPANYING HARDWARE.

2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES

. IN NO EVENT SHALL

CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSO-

EVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSI-

NESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS

INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE

DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO

USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN AD-

VISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES

DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CON-

SEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMI-

TATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE

LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted

computer software” submitted with restricted rights in accordance with Section 52227-19 (a)

through (d) of the Commercial Computer Software - Restricted Rights Clause and its succes-

sors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as defined

in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1)

(ii) and its successors, and use, duplication, disclosure by the Government is subject to re-

strictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester,

New Hampshire 03867-0505.

SAFETY INFORMATION

LASER RADIATION AND CONNECTORS

When the connector is in place, all laser radiation remains within the fiber. The maximum

amount of radiant power exiting the fiber (under normal conditions) is -12.6 dBm or 55 x 10

-

6

watts. Removing the optical connector from the transceiver allows laser radiation to emit

directly from the optical port. The maximum radiance from the optical port (under worst case

conditions) is 0.8 W cm

-2

or 8 x 10

3

W m

2

sr

-1

.

Do not use optical instruments to view the laser output. The use of optical instruments to view

laser output increases eye hazard. When viewing the output optical port, power must be re-

moved from the network adapter.

DECLARATION OF CONFORMITY

Application of Council Directive(s): 89/336/EEC

73/23/EEC

Manufacturer’s Name: Cabletron Systems, Inc.

Manufacturer’s Address: 35 Industrial Way

PO Box 5005

Rochester, NH 03867

European Representative Name: Mr. J. Solari

European Representative Address: Cabletron Systems Limited

Nexus House, Newbury Business Park

London Road, Newbury

Berkshire RG13 2PZ, England

Conformance to Directive(s)/

Product Standards: EC Directive 89/336/EEC

EC Directive 73/23/EEC

EN 55022

EN 50082-1

EN 60950

Equipment Type/Environment: Networking Equipment, for use in a Com-

mercial or Light Industrial Environment.

We the undersigned, hereby declare, under our sole responsibility, that the equip-

ment packaged with this notice conforms to the above directives.

Manufacturer Legal Representative in Europe

Mr. Ronald Fotino

Mr. J. Solari

Full Name Full Name

Principal Compliance Engineer

Managing Director - E.M.E.A.

Title Title

Rochester, NH, USA

Newbury, Berkshire, England

Location Location

9032947 Table Of Contents i

TABLE OF CONTENTS

PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Other Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi

Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi

1. PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Spanning Tree Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Frame Buffering and Frame Latency. . . . . . . . . . . . . . . . . . . . . . . .6

Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Non-volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Configuration and Management Interfaces . . . . . . . . . . . . . . . . . . .7

RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Port Mirroring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Broadcast Throttling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Full Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Client/Server Network Application . . . . . . . . . . . . . . . . . . . . . . . . .11

Local Backbone Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . .14

Mounting the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . .17

Powering the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Power-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

ii Table Of Contents ELS100-24TXG

Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1000Base-X Gigabit Ethernet Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3. ELS100-24TXG USER INTERFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

User Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Factory Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Menu Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

System Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SNMP Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Switch Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Forwarding Table Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . 31

Spanning Tree Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Spanning Tree Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . 35

Spanning Tree Port #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . 36

VLAN Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

VLAN Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

VLAN #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

VLAN Port Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Class of Service Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . 41

Port Priority Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Port Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Switch Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Switch Summary Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Port Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

General Information Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Download Software Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Save Current Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Return to Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4. CONFIGURING & MONITORING THE SWITCH . . . . . . . . . . . . . . . . . . . . . 53

Common Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Setting Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Assigning an IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Checking Network Configuration Status. . . . . . . . . . . . . . . . . . . . . . . . 55

Connecting via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Setting SNMP Management Access . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Viewing Switch Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Configuring Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Downloading a Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Downloading Via the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Downloading Via TFTP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9032947 Table Of Contents iii

Configuring Spanning Tree Parameters . . . . . . . . . . . . . . . . . . . . . . . .58

Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Configuring Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Configuring Port Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Configuring the Forwarding Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Configuring Broadcast Cutoff Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Setting a Default Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Configuring BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

5. SNMP MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

The SNMP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

MIB Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

RFC 1213 (MIB-II) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

RFC 1398 (Ethernet MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

RFC 1493 (Bridge MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

RFC 1757 (RMON MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Cabletron Proprietary MIB Extensions. . . . . . . . . . . . . . . . . . . . . .67

Compiling MIB Extensions: Cabletron Website. . . . . . . . . . . . . . . . . . .70

APPENDIX A. TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . .71

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . .73

MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . .74

Power Cord Set Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Country-Specific Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . .75

APPENDIX B. SPANNING TREE CONCEPTS. . . . . . . . . . . . . . . . . . . . . . . . .77

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Spanning Tree Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Spanning Tree Protocol in a Network . . . . . . . . . . . . . . . . . . . . . . . . . .78

Spanning Tree Protocol Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . .78

Spanning Tree Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Communicating Between Bridges . . . . . . . . . . . . . . . . . . . . . . . . .80

Selecting a Root Bridge and Designated Bridges . . . . . . . . . . . . .80

Selecting Designated Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Handling Duplicate Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Remapping Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . .80

iv Table Of Contents ELS100-24TXG

APPENDIX C. FLOW CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

APPENDIX D. VIRTUAL LANS (VLANS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

VLANs and Frame Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

ELS100-24TXG VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . 84

VLAN ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Ports in VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

VLAN Egress Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

VLAN Access Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

VLAN Hybrid Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

VLAN Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

APPENDIX E. CLASS OF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

APPENDIX F. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . 91

INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

9032947 Preface v

PREFACE

Purpose

This guide provides information about the features and applications of the

Cabletron ELS100-24TXG switch as well as instructions for configuring

and monitoring the switch.

Audience

This guide is intended for Ethernet local area network (LAN)

administrators and Management Information Systems (MIS) personnel

with the following background:

•

Working knowledge of Ethernet LANs

•

Familiarity with Transmission Control Protocol/Internet Protocol

(TCP/IP) and Simple Network Management Protocol (SNMP)

Conventions

This section describes the conventions used in this guide.

Message Formats

Two types of messages, identified by icons, appear in the text:

Keyboard Entries

This guide uses the following conventions for keyboard entries:

•

When you read “enter,” type the text and press the [Enter] key.

•

Example: Enter the Gateway IP address and press the [Enter] key.

•

When you read “select,” type the letter associated with the

parameter.

Example: Select

a

from the System Configuration Menu to view the

SNMP Configuration Menu.

A note informs you of special circumstances.

A caution indicates the possibility of equipment damage.

vi Preface ELS100-24TXG

Other Conventions

This guide uses the following typographical conventions:

•

Initial Caps Menu titles and console menu selections.

•

[Enter] Used to designate the Enter or Return key.

•

ALL CAPS Used to designate fields within the console menus

(Example: CONNECTION).

•

courier font

Screen messages and user prompts.

•

Selection Describes a user-configurable user interface item.

•

Field Describes a read-only information item.

Organization

Chapter 1. Product Overview

: Describes the features of the switch, front

and rear panel components and application examples.

Chapter 2. Installation

: Describes the content of your switch shipment,

lists site requirements, and provides mounting instructions. Instructions

for making connections and powering up the switch are provided as well.

Chapter 3. ELS100-24TXG User Interface

: Describes the user interface

console menus and lists the factory defaults for system settings. Each of

the console menus are presented along with a description of the

selections/fields available within each menu.

Chapter 4. Configuring and Monitoring the Switch

: Describes

common tasks and associated steps required to configure the switch, and

covers common switch and network considerations required to ensure

system integrity.

Chapter 5. SNMP Management

: Describes how the Simple Network

Management Protocol (SNMP) communication protocol is used to

manage the switch, and provides a description of industry standard and

proprietary Managed Information Bases (MIBs) supported by the switch.

Appendix A. Technical Specifications

: Provides a list of standards

compliance and certifications as well as physical and operational

specifications.

Appendix B. Spanning Tree Concepts

: Describes the operation of the

Spanning Tree Protocol and how it is used to resolve the problems of

physical loops in a network.

Appendix C. Flow Control

: Describes how the flow control features are

used to provide a mechanism for protecting the switch from overload

conditions and to keep additional traffic off the network.

Appendix D.

Virtual LANs (VLANs)

: Describes how the switch uses

VLANs to create isolated network domains, and provides illustrations of

VLAN switch configurations.

9032947 Preface vii

Appendix E.

Class of Service

: Describes how the traffic Class of Service

features can be used to assign mission-critical data a higher priority

through the switch by delaying less critical traffic during periods of

congestion.

Appendix F.

Acronyms and Abbreviations

: Provides definitions for a

list of common acronyms and abbreviations used within the user guide

and the networking industry.

9032947 Product Overview 1

1. PRODUCT OVERVIEW

Description

This installation and user guide describes the Cabletron ELS100-24TXG

Ethernet switch. The switch is IEEE 802.1D-compliant and supports 24

IEEE 802.3u 100Base-TX Fast Ethernet ports. Each port can alternatively

operate as an IEEE 802.3i 10Base-T port. Additionally, the switch

features 2 Gigabit Ethernet ports which operate at 1 Gbps. These ports

support the various physical media transceiver flavors of IEEE 802.3z

Gigabit Ethernet through the use of modular Gigabit Interface Converters

(GBICs). Supported media includes multi-mode fiber, single mode fiber,

and twinax copper.

The Cabletron ELS100-24TXG switch automatically learns end-station

addresses from the network and stores them in a Media Access Control

(MAC) address forwarding table. Incoming packets are then forwarded to

the appropriate output port based on the addresses in the packet. Each

port on the switch operates at full wire speed with full address and frame

filtering.

The Cabletron ELS100-24TXG switch contains advanced features such

as Remote Monitoring (RMON), IEEE 802.1Q virtual LANs (VLANs),

IEEE 802.1p Class of Service, flow control and broadcast throttling. For

network management, the ELS100-24TXG switch includes a standards-

compliant Simple Network Management Protocol (SNMP) agent. This

agent allows network management station applications to collect and

present status and performance information about a switch as well as

providing the ability to configure and control functions on the device.

Network management can also be performed in-band using the popular

TCP/IP application, Telnet. In addition, a serial console port allows out-of-

band management using a PC or a terminal. The ELS100-24TXG switch

is desktop or rack-mountable. LEDs on the front panel provide information

about the operating status of the switch. The back panel of the switch

contains the power connector and a power switch. Two fans maintain

ventilation and cooling for internal switch components.

This chapter provides the following information:

•

Product Description

•

Features

•

Front and Rear Panel Component Descriptions

•

Feature Summaries

•

Application Examples

2 Product Overview ELS100-24TXG

Features

•

Ports:

- 24 dual-speed 10Base-T/100Base-TX ports using RJ-45

connectors (MDI-X)

- 2 1000Base-X Gigabit Ethernet ports using modular GBIC

transceivers

•

Architecture:

- 8-port 10/100 and 1-port Gigabit Ethernet switch ASICs in a

distributed switching architecture

- 4.2 Gbps internal switching fabric

- 12 MB packet buffering (512 KB/port) for 10/100 ports

- 16 MB packet buffering (8 MB/port) for Gigabit Ethernet ports

- 4096 MAC address forwarding table per port; up to 16,384

addresses per system

- IEEE 802.3u auto-negotiation for full/half duplex and 10/100

Mbps speed operation on all RJ-45 10/100 ports

- High performance store-and-forward switching

•

Performance:

- Forwarding: over 6 million packets-per-second (64 byte

packets)

- Filtering: 6.5 million packets-per-second (64 byte packets)

•

Traffic Management:

- Tag and port-based VLANs per the IEEE 802.1Q draft

standard - 4094 VLAN IDs recognized per switch

- Class of Service support per the IEEE 802.1p draft standard

- Flow control per port: IEEE 802.3x frame-based for full duplex;

back-pressure for half duplex

- Broadcast throttling for broadcast storm control

•

Network Management:

- SNMP compliant agent: MIB II (RFC 1213); Bridge MIB (RFC

1493); Ethernet MIB (RFC 1398); RMON - Statistics, History,

Alarm and Event groups per port (RFC 1757); private MIB

extensions

- Port mirroring for network monitoring and analysis

- Telnet

- Console port, RS-232, female DB-9 connector, null modem

- BootP/DHCP for IP address configuration

•

LED Indicators

- 10Base-T/100Base-TX Ethernet ports: Link, Activity, 100Mbps

Speed, Full Duplex

- 1000Base-X Gigabit Ethernet ports: Link and Activity

- System: Power, Test

9032947 Product Overview 3

•

Software:

- Extensive diagnostics for product testing and troubleshooting

- Upgrades using the front panel console port or in-band with

TFTP

Front Panel

Figure 1-1 shows the front panel of the Cabletron ELS100-24TXG. Table

1-1 defines the ELS100-24TXG front panel components.

Figure 1-1. ELS100-24TXG Front Panel

Table 1-1. Front Panel Components

Name Function

Gigabit Ethernet ports 25

and 26 LEDs

Indicates Link and Activity information (see Table 1-2

for details).

1000Base-X Gigabit

Ethernet ports

Gigabit Ethernet ports using GBIC modules.

Ports 1-24 LEDs Indicates Link, Activity, Speed and Duplex information

(see Table 1-2 for details).

10Base-T/100Base-TX

RJ-45 ports

Copper ports using RJ-45 port connectors. These

ports are wired MDI-X.

LED mode button Button used to switch RJ-45 port LEDs between Link/

Activity mode and 100M/Full Duplex mode. This button

has no affect on Gigabit Ethernet port LEDs.

Power LED Lights steady green to indicate power is supplied to the

switch. Off indicates no power is supplied to the switch.

Test LED Lights steady green after a reset and remains on until

successful completion of power-on self tests. Off indi-

cates a successful completion of the power-on self

tests.

Console port Female DB-9 connector configured as a null modem

connection for serial out-of-band management using

the console menus.

4 Product Overview ELS100-24TXG

Figure 1-2 shows the Link and Activity LEDs for the 2 1000Base-X

Gigabit Ethernet ports. The LEDs are positioned to the left of their

associated port.

Figure 1-2. 1000Base-X Gigabit Ethernet Port LEDs

Figure 1-3 shows the Link and Activity port LEDs for 24 10Base-T/

100Base-TX ports (default configuration).

Pressing the front panel LED mode button changes the operation of the

RJ-45 LEDs to show Speed and Full Duplex operation, as shown in

Figure 1-4.

Figure 1-3. Port LEDs Default Configuration

Figure 1-4. Port LEDs LED Mode Button Pressed

The numbers above and below the port LEDs identify the

LEDs associated with a specific RJ-45 port.

Link LEDs

Activity LEDs

Link

234

5678

1

Activity

Link

Activity

Link

10 11 12

13 14 15 16

9

Activity

Link

Activity

Link

18 19 20

21 22 23 24

17

Activity

Link

Activity

10/100 speed

234

5678

1

Full/half duplex

10/100 speed

Full/half duplex

10/100 speed

10 11 12

13 14 15 16

9

Full/half duplex

10/100 speed

Full/half duplex

10/100 speed

18 19 20

21 22 23 24

17

Full/half duplex

10/100 speed

Full/half duplex

9032947 Product Overview 5

The port LEDs are grouped to the left of their corresponding RJ-45 ports.

Table 1-2 defines the performance of the port LEDs for the 10Base-T/

100Base-TX ports in both the default configuration and with the LED

mode button pressed.

Table 1-2. Port LEDs Defined

Rear Panel

Figure 1-5 shows the ELS100-24TXG rear panel and Table 1-3 defines

the rear panel components.

Figure 1-5. ELS100-24TXG Rear Panel

Table 1-3. Rear Panel Components

Name Function

Gigabit

Ethernet Ports

Link LED On: Indicates a valid connection (link) on the associated port.

Link LED Off: Indicates no link on the associated port.

Activity LED flashing: Indicates the presence of transmit and/or re-

ceive activity.

Activity LED Off: Indicates the absence of transmit or receive activity.

RJ-45 Ports

Default

Configuration

Link LED On: Indicates a valid connection (link) on the associated port.

Link LED Off: Indicates no link on the associated port.

Activity LED flashing: Indicates the presence of transmit and/or re-

ceive activity.

Activity LED Off: Indicates the absence of transmit or receive activity.

RJ-45 Ports

LED mode

button pressed

Speed LED On: Indicates the port is in the 100Base-TX mode.

Speed LED Off: Indicates the port is in the 10Base-T mode.

Duplex LED On: Indicates the port is in the full duplex mode.

Duplex LED Off: Indicates the port is in the half duplex mode.

Name Function

Power Connector Provides AC power to the switch.

Power Switch Allows you to turn the switch power on and off.

Fan Outlets Air exit vents through which internal fans discharge air

for ventilation purposes.

6 Product Overview ELS100-24TXG

Feature Summaries

The following summaries provide a brief description of ELS100-24TXG

features in areas such as standards compliance, functionality,

performance, and options.

IEEE 802.1D Bridge

The ELS100-24TXG switch is fully compliant with IEEE 802.1D

transparent bridging specifications. An aggregate address table,

containing 4096 entries per 8 10/100 ports and per Gigabit Ethernet port,

is provided for learning, filtering, and forwarding. The switch can support

up to a maximum of 16,384 addresses. Addresses are automatically

learned by the switch, and can be individually assigned specific

forwarding treatment by the network administrator if desired. Forwarding

table configuration can be made out-of-band via the console interface or

in-band via SNMP or Telnet. Static and dynamic addresses are both

stored in this table. One static address is assigned per port by default. The

Forwarding Table Configuration screen in the console menus allows you

to assign additional static addresses if required.

Spanning Tree Protocol

The ELS100-24TXG switch supports the IEEE 802.1D Spanning Tree

Protocol. This protocol allows redundant connections to be created

between different LAN segments for purposes of fault tolerance. Two or

more physical paths between different segments can be created through

the switch, with the Spanning Tree Protocol choosing a single path at any

given time and disabling all others. If the chosen path fails for any reason,

a disabled alternative is activated, thereby maintaining the connection.

This prevents network traffic from circulating in an endless loop formed by

multiple connections to the same LAN segment.

Spanning Tree parameters are configurable in the Spanning Tree

Configuration Menu using the console menus or via SNMP (see Appendix

B, “Spanning Tree Concepts,” for more information).

Frame Buffering and Frame Latency

The ELS100-24TXG switch is a store-and-forward switching device. Each

frame is copied into switch memory before being forwarded to another

port. This method ensures that all forwarded frames conform to a

standard Ethernet frame size and have a correct cyclic redundancy check

(CRC) for data integrity. This switching method prevents bad frames from

traversing the network and using up valuable network bandwidth, as with

cut-through switching technology.

To minimize the possibility of dropping frames on congested ports, the

ELS100-24TXG switch provides 512 KB per 10/100 port and 8 MB per

Gigabit Ethernet port of dynamically allocated frame buffering. This buffer

space is used to queue packets for transmission on congested networks.

This is an additional advantage over cut-through switching technology,

which drops packets immediately when experiencing collisions.

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